This fonds contains reports, addresses, and articles by Haslam, as well as reprints of articles and dissertation summaries produced by the Department of Physics Betatron Group, 1951-1956. Additionally, it contains correspondence, membership lists, submissions, and clippings related to the Association of Retired Faculty.

This collection contains considerable material relating to aviation history, particularly in western and northern Canada, including material on: the Keng Wah Aviation School for Nationalist Chinese pilots; the RCAF; illustrations of the technology of flight; reference material; and microfilms of the Hudson Strait Expedition fonds (1927-1928) and "The Bulletin" (Western Canada Airways, 1929-1937). Additionally, there is material on Tweddell's other research interests, notably aerial mapping and surveying.

This fonds contains records mainly related to Sylvia’s time as Lieutenant Governor, with correspondence, invitations, clippings, photographs and memorabilia. It also includes documents from her career as a physicist including correspondence, notes, and clippings. Clippings, photographs, and correspondence relating to Sylvia’s involvement in sports is included – predominantly curling and golf, but also fishing, baseball, basketball, and track and field. There is extensive photography and other materials documenting her travels around the world, as well as gatherings with friends and family.